50 Blue MARINE HELIOTROPE Heliotropium Arborescens Flower Seeds BLOOM TIME: Summer HARDINESS ZONE: 10 - 11 PLANT HEIGHT: 14 - 18" . . . PLANT SPACING: 12 - 15" LIGHT REQUIREMENTS: Sun - Part Shade . . . SOIL / WATER: Average Marine Heliotrope has beautiful, fragrant 6 inches flower heads. This plant is also suitable for growing in containers.